In data center and high performance computing applications such as inter-switch links or server to switch links, the use of high performance 10 Gigabit Ethernet fiber transceivers is overkill and an unneeded cost. The 10Gbase-CX4 XENPAK transceiver allows for transmitting 10 Gigabit Ethernet over copper cabling for distances of up to 15m, dramatically lowering the media cost without impacting performance.